Unable to combine into single document in Preview
Since upgrading to macOS Sierra I'm unable to get my Epson WF-3640 to to combine into single document in Preview. If I select PDF and combine it scans all pages in the ADF but only the first one shows up in Preview. The Epson scan sofrtware program seems to be able to scan just fine.
How do I get Preview working again?
iMac (Retina 5K, 27-inch, Late 2014), OS X El Capitan (10.11.5)